U 120x45x4.75 IAS · Weight & Dimensions

IAS, cold-formed sections · Cold-formed Channel

Cold-formed channels (U shapes) are similar to C shapes but without stiffening lips. Used for light structural framing, supports, and secondary members.

Also known as: U 120x45x4.75 (UK / Australia)

The U 120x45x4.75 steel profile weighs 7.3 kg/m (4.87 lb/ft), has a depth of 120 mm (4.72 in), flange width 45 mm (1.77 in). Cross-sectional area: 923.281 mm². Moment of inertia Ix = 185.073 cm⁴, Iy = 16.491 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	120 mm	4.72 in
Width (b)	45 mm	1.77 in
Thickness (t)	4.8 mm	0.19 in
Weight	7.3 kg/m	4.87 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	923.28 mm²	1.431 in²
Moment of inertia (Ix)	185.07 cm⁴	4.45 in⁴
Moment of inertia (Iy)	16.49 cm⁴	0.40 in⁴
Elastic section modulus (Sx)	30.85 cm³	1.882 in³
Elastic section modulus (Sy)	4.96 cm³	0.303 in³
Plastic section modulus (Zx)	39.11 cm³	2.387 in³
Plastic section modulus (Zy)	6.58 cm³	0.401 in³
Radius of gyration (rx)	4.48 cm	1.763 in
Radius of gyration (ry)	1.34 cm	0.526 in